13564816 has 20 divisors (see below), whose sum is σ = 26350000. Its totient is φ = 6764832.

The previous prime is 13564813. The next prime is 13564843. The reversal of 13564816 is 61846531.

It is a happy number.

It is a super-2 number, since 2×13564816² = 368008466227712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13564813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7135 + ... + 8833.

It is an arithmetic number, because the mean of its divisors is an integer number (1317500).

Almost surely, 2^13564816 is an apocalyptic number.

13564816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13564816 is a deficient number, since it is larger than the sum of its proper divisors (12785184).

13564816 is a wasteful number, since it uses less digits than its factorization.

13564816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206 (or 2200 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 13564816 is about 3683.0443928902. The cubic root of 13564816 is about 238.4906198744.

The spelling of 13564816 in words is "thirteen million, five hundred sixty-four thousand, eight hundred sixteen".